[Jack]

Steverino, one thing I've noticed about the Speer manuals (which are good ones) is that Speer is far more likely than other manual publishers to recommend a magnum primer with any ball powder.
Often, Speer recommends a magnum primer for a load using ball powder, when the maker of the powder (Hodgdon, for example) recommends a standard primer.
I've never been able to tell why that difference appears.
But, it's an example of why it's a good idea to check more than one manual.
BTW, you may not need to buy the big, bound Hodgdon manual. Hodgdon now prints a yearly update, in the form of a magazine, that contains most of their loading data, less ballistic tables and some of the other extras that many manuals have. The yearly Hodgdon update publication is cheaper, too, running around 8-10 dollars.